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Gold Dredge
A gold dredge is a placer mining machine that extracts gold from sand, gravel, and dirt using water and mechanical methods. The original gold dredges were large, multi-story machines built in the first half of the 1900s. Small suction machines are currently marketed as "gold dredges" to individuals seeking gold: just offshore from the beach of Nome, Alaska, for instance. A large gold dredge uses a mechanical method to excavate material (sand, gravel, dirt, etc.) using steel "buckets" on a circular, continuous "bucketline" at the front end of the dredge. The material is then sorted/sifted using water. On large gold dredges, the buckets dump the material into a steel rotating cylinder (a specific type of trommel called "the screen") that is sloped downward toward a rubber belt (the stacker) that carries away oversize material (rocks) and dumps the rocks behind the dredge. The cylinder has many holes in it to allow undersized material (including gold) to fall into a sluice ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otago
Otago (, ; mi, Ōtākou ) is a region of New Zealand located in the southern half of the South Island administered by the Otago Regional Council. It has an area of approximately , making it the country's second largest local government region. Its population was The name "Otago" is the local southern Māori dialect pronunciation of "Ōtākou", the name of the Māori village near the entrance to Otago Harbour. The exact meaning of the term is disputed, with common translations being "isolated village" and "place of red earth", the latter referring to the reddish-ochre clay which is common in the area around Dunedin. "Otago" is also the old name of the European settlement on the harbour, established by the Weller Brothers in 1831, which lies close to Otakou. The upper harbour later became the focus of the Otago Association, an offshoot of the Free Church of Scotland, notable for its adoption of the principle that ordinary people, not the landowner, should choose the ministe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dredges
Dredging is the excavation of material from a water environment. Possible reasons for dredging include improving existing water features; reshaping land and water features to alter drainage, navigability, and commercial use; constructing dams, dikes, and other controls for streams and shorelines; and recovering valuable mineral deposits or marine life having commercial value. In all but a few situations the excavation is undertaken by a specialist floating plant, known as a dredger. Dredging is carried out in many different locations and for many different purposes, but the main objectives are usually to recover material of value or use, or to create a greater depth of water. Dredges have been classified as suction or mechanical. Dredging has significant environmental impacts: it can disturb marine sediments, leading to both short- and long-term water pollution, destroy important seabed ecosystems, and can release human-sourced toxins captured in the sediment. Description ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold Dredges
Gold is a chemical element with the symbol Au (from la, aurum) and atomic number 79. This makes it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal in a pure form. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements and is solid under standard conditions. Gold often occurs in free elemental ( native state), as nuggets or grains, in rocks, veins, and alluvial deposits. It occurs in a solid solution series with the native element silver (as electrum), naturally alloyed with other metals like copper and palladium, and mineral inclusions such as within pyrite. Less commonly, it occurs in minerals as gold compounds, often with tellurium (gold tellurides). Gold is resistant to most acids, though it does dissolve in aqua regia (a mixture of nitric acid and hydrochloric acid), forming a soluble tetrachloroaurate anion. Gold i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eldorado, Victoria
Eldorado, or El Dorado, is a small town in the north-east of Victoria, Australia. At the 2016 census, Eldorado had a population of 264, down from a population of 287 at the time of the 2006 census. History Eldorado was named after the legend of El Dorado in 1840 by William Baker, the name he used for his run. Even though the name refers to a land abounding in gold there was no gold found in Eldorado until the 1850s when it became a thriving gold rush town. Eldorado Post Office opened on 1 August 1861. The town's population declined sharply after the area ceased to yield gold. The remains of an old gold dredge can still be seen today. This is a large steel dredge which was designed and built by Thompson's Engineering for the Cocks Eldorado Gold Dredging Company in 1935–36. By the time it was decommissioned it had dredged 30 million cubic metres from the river flats of the Eldorado Plain. It has 110 digging buckets, each of which was capable of digging and lifting 0.3 cubic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oakland Museum Of California
The Oakland Museum of California or OMCA (formerly the Oakland Museum) is an interdisciplinary museum dedicated to the art, history, and natural science of California, located adjacent to Oak Street, 10th Street, and 11th Street in Oakland, California. The museum contains more than 1.8 million objects dedicated to "telling the extraordinary story of California." History The OMCA was founded in 1969 as merger of three smaller area museums – the Oakland Public Museum, Oakland Art Gallery, and the Snow Museum of Natural History. The seeds of this merger began in 1954 when the three organizations established a nonprofit association with the goal of merging their collections under one umbrella. This plan was eventually realized in 1961 when voters approved a $6.6 million bond issue to start the development of what would become the OMCA campus overlooking Lake Merritt in the city center. The museum's founding credo positioned itself as a “people’s museum,” wherein it was ded ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
YouTube
YouTube is a global online video platform, online video sharing and social media, social media platform headquartered in San Bruno, California. It was launched on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim. It is owned by Google, and is the List of most visited websites, second most visited website, after Google Search. YouTube has more than 2.5 billion monthly users who collectively watch more than one billion hours of videos each day. , videos were being uploaded at a rate of more than 500 hours of content per minute. In October 2006, YouTube was bought by Google for $1.65 billion. Google's ownership of YouTube expanded the site's business model, expanding from generating revenue from advertisements alone, to offering paid content such as movies and exclusive content produced by YouTube. It also offers YouTube Premium, a paid subscription option for watching content without ads. YouTube also approved creators to participate in Google's Google AdSens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discovery Channel
Discovery Channel (known as The Discovery Channel from 1985 to 1995, and often referred to as simply Discovery) is an American cable channel owned by Warner Bros. Discovery, a publicly traded company run by CEO David Zaslav. , Discovery Channel was the third most widely distributed subscription channel in the United States, behind now-sibling channel TBS and The Weather Channel; it is available in 409 million households worldwide, through its U.S. flagship channel and its various owned or licensed television channels internationally. It initially provided documentary television programming focused primarily on popular science, technology, and history, but by the 2010s had expanded into reality television and pseudo-scientific entertainment. , Discovery Channel is available to approximately 88,589,000 pay television households in the United States. History John Hendricks founded the channel and its parent company, Cable Educational Network Inc., in 1982. Several investo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold Rush (TV Series)
''Gold Rush'' (titled ''Gold Rush: Alaska'' for the first season) is a reality television series that airs on Discovery and its affiliates worldwide. The series follows the placer gold mining efforts of various family-run mining companies, mostly in the Klondike region of Dawson City, Yukon, Canada, as well as in the U.S. state of Alaska. In its 12th season as of early 2021, prior seasons also included mining efforts in South America and western North America. Overview Season 1 The show was named ''Gold Rush: Alaska'' in its first season, and featured six men from Sandy, Oregon, a small town southeast of Portland. Due to the economic downturn, the men had lost their jobs; they decided on an all-stakes gamble—travel to Porcupine Creek, Alaska to prospect for gold. Most of the people on the show had little or no previous placer gold mining experience and had to learn on the job. By the end of the season, the Hoffman crew had recovered 14.64 ounces. Season 2 In seaso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Garland (Australian Politician)
Charles Launcelot Garland (1854 – 7 January 1930) was a New Zealand-born Australian politician and mining entrepreneur. He was the founder of the town of Leadville, N.S.W. He was born at Auckland to sea captain William Riley Garland and Nancy Turner. He was a miner from an early age, and migrated to New South Wales in 1879. Around 1882 he married Mary Newland, with whom he had a son. Garland died in Sydney in 1930, and was buried at the Gore Hill Cemetery. Business career From 1882 he was an assurance agent, and was also successful mining at Leadville, on the Palmer River in Far North Queensland, and on the Macquarie River. Garland is credited with being the first to introduce gold dredging—a technique used extensively in his native New Zealand—to New South Wales, He launched the first gold dredge on the Macquarie in 1899. By 1905, there were 42 dredges working in New South Wales, resulting in a significant revival of gold production. Political career In 18 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eldorado Dredge Panorama
El Dorado (, ; Spanish for "the golden"), originally ''El Hombre Dorado'' ("The Golden Man") or ''El Rey Dorado'' ("The Golden King"), was the term used by the Spanish in the 16th century to describe a mythical tribal chief (''zipa'') or king of the Muisca people, an indigenous people of the Altiplano Cundiboyacense of Colombia, who as an initiation rite, covered himself with gold dust and submerged in Lake Guatavita. The legends surrounding El Dorado changed over time, as it went from being a man, to a city, to a kingdom, and then finally to an empire. A second location for El Dorado was inferred from rumors, which inspired several unsuccessful expeditions in the late 1500s in search of a city called Manoa on the shores of Lake Parime or Parima. Two of the most famous of these expeditions were led by Sir Walter Raleigh. In pursuit of the legend, Spanish conquistadors and numerous others searched what is today Colombia, Venezuela, and parts of Guyana and northern Brazil, for the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grey River (New Zealand)
The Grey River / Māwheranui is located in the northwest of the South Island of New Zealand. It rises 12 kilometres southwest of the Lewis Pass in Lake Christabel, one of numerous small lakes on the western side of the Southern Alps, and runs westward for 120 kilometres before draining into the Tasman Sea at Greymouth. Thomas Brunner, who explored the area in the late 1840s, named the river in honour of Sir George Grey, who first served as Governor of New Zealand from 1845 to 1854. The Ngāi Tahu Claims Settlement Act 1998 changed the official name of the river to Grey River / Māwheranui in 1998. The Māori name for the river system and surrounding area is ''Māwhera'', with ''Māwheranui'' being distinguished from the northern branch Little Grey River / Māwheraiti. The New Zealand Ministry for Culture and Heritage gives a translation of "broad and widespread (river mouth)" for ''Māwheranui''. Numerous small rivers are tributaries of the Grey, and several of them also drain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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